Which one of the following is a direct ecological factor?

A. Light

B. Temperature

C. Atmosphere

D. All of these

Answer: Option B

Solution(By Examveda Team)

Temperature is a direct ecological factor.
Ecological factors include factors such as light, radiation, temperature, water, chemicals, gases, wind and soil. The direct effect is the effect of exposure on the outcome absent the mediator.
Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness.